It's a great tour. For one, it is very scenic and on the other hand, it has here and there to offer ups and downs (which is the otherwise flat Lower Rhine) not so common. An absolute treat.
The Swalmdal is a Natura2000 area. The meandering stream the Swalm runs through the valley. The stream is located at the transition from the plateau between the Maas and the Rhine to the Meuse valley.